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Published on: February 27, 2021
Surface modification of an Mg-1Ca alloy to slow down its biocorrosion by chitosan
1State Key Laboratory for Turbulence and Complex System and College of Engineering, Peking University, Beijing 100871, People's Republic of China. gxn139888@pku.edu.cn
Abstract:
The surface morphologies before and after immersion corrosion test of various chitosan-coated Mg-1Ca alloy samples were studied to investigate the effect of chitosan dip coating on the slowdown of biocorrosion. It showed that the corrosion resistance of the Mg-Ca alloy increased after coating with chitosan, and depended on both the chitosan molecular weight and layer numbers of coating. The Mg-Ca alloy coated by chitosan with a molecular weight of 2.7 x 10(5) for six layers has smooth and intact surface morphology, and exhibits the highest corrosion resistance in a simulated body fluid.
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